You've tried various methods but the color of your product photos is dull. Well, you can try this trick, KEE friends! It's called a color spot, it can have a different effect on your product.
1. Use a reflective base such as acrylic. Put the product on it. You can use double-sided tape so that the product can stand as you want.
Source : Peta Pixel/Dustin Dolby
2. Use light from the right using a speedlight with a stripbox facing away from the background. This needs to be paid attention to because the darker the background, the more prominent the color of your product will be, aka the more visible color spots.
Source : Peta Pixel/Dustin Dolby
You can also add light by adding color to the speedlight.
Source : Peta Pixel/Dustin Dolby
This is what the camera settings look like. Shoot close to a wall so you can reflect the light from the wall to the back of the object. We can play with this reflection of light by giving it various colors.
Source : Peta Pixel/Dustin Dolby
Source : Peta Pixel/Dustin Dolby
Source : Peta Pixel/Dustin Dolby
Good luck!